Answer the following statement(s) true (T) or false (F)
1.Attenuation is the internationally recognized unit of loudness and is measured in decibels (dB).
2.Energy efficiency is one of the most important features of a green home.
3.Automatic controls such as timers will reduce electricity waste in a house.
4.One of the best choices for energy-efficient lighting is incandescent lighting fixtures.
1.false
2.true
3.true
4.false
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To what pressure must water be compressed at 50°C to change its density by 1%? Assume that ? is independent of P.
Express the volume expansivity and the isothermal compressibility as functions of density ? and its partial derivatives. For water at 50°C and 1 bar, ? = 
This tool is used to enlarge the end of a machined hole to a specified diameter and depth usually for recessing the head of a bolt or screw.
a. drill b. ream c. bore d. counterbore
Are the three groups of traits scientists use to classify soil structure type, class, and grade?
Indicate by YES (Y) or NO (N).
Which of the following is not part of a cam print?
A. a chart giving the values of the angles of the follower at each position B. the cam profile C. hub dimensions, including cam shaft, outside diameter, keyway dimensions D. construction lines E. none of the above